CCXL features 240 ways to play:
Choose one level of complexity among 3
Choose one victory condition among 5
Choose how many variants and which of them among 4, which means 16 combos
and you have 3x5x16 = CCXL ways to play CCXL

The game contains 188 cards in 7 colors, new drafts possibilities, new city size, new bicolored cards, new rules for more interaction during the building phase, new Pollution cards, new Parc cards...

You are still the mayor of a city, but now you have new abilities and new powers.